Dungeons & Dragons has a wealth of unofficial rulebooks published by third-party creators instead of Wizards of the Coast for both players and DMs.
More great Non-Wotc D&D Rulebooks. What are your favourites?

seen from T1

seen from T1
seen from China

seen from Germany

seen from United Kingdom

seen from United States
seen from United States

seen from Australia
seen from T1
seen from Germany

seen from Türkiye

seen from Bangladesh

seen from United States
seen from Germany

seen from France

seen from United States
seen from United Kingdom
seen from Indonesia
seen from China
seen from United States
Dungeons & Dragons has a wealth of unofficial rulebooks published by third-party creators instead of Wizards of the Coast for both players and DMs.
More great Non-Wotc D&D Rulebooks. What are your favourites?
Many fans and publishers have released their own premade adventures for D&D 5e, with all the content necessary to sustain a full campaign.
Maybe you still don't trust WotC? Maybe you want to support other creators? Try these D&D Adventures from third-party publishers. Feel free to reply with your recommendations.